12289281625621 has 48 divisors (see below), whose sum is σ = 16798177908288. Its totient is φ = 8837740396800.

The previous prime is 12289281625619. The next prime is 12289281625639. The reversal of 12289281625621 is 12652618298221.

It is a happy number.

It is not a de Polignac number, because 12289281625621 - 2¹ = 12289281625619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289281025621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36781606 + ... + 37114216.

It is an arithmetic number, because the mean of its divisors is an integer number (349962039756).

Almost surely, 2^{12289281625621} is an apocalyptic number.

12289281625621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12289281625621 is a deficient number, since it is larger than the sum of its proper divisors (4508896282667).

12289281625621 is a wasteful number, since it uses less digits than its factorization.

12289281625621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337922 (or 337915 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 55.

The spelling of 12289281625621 in words is "twelve trillion, two hundred eighty-nine billion, two hundred eighty-one million, six hundred twenty-five thousand, six hundred twenty-one".